It wasn't particularly easy for Katie to look through the refrigerator since her belly kept getting in the way. She wasn't used to it being so big and she kept bumping it into things or stopping to cradle the weight in her arms.
Meanwhile Tiff grew bored and started looking through the cabinets for something to play with. There were a lot of cans that were too heavy for her to lift and impossible for her to open so she didn't bother with them. Crawling over to another cabinet she found something much better, a box of cookies with a picture of a puppy on them. She opened the box and reached in to grab a handful of the little paw shaped snacks. The puppy cookies smelled a little funny so she decided to test one before putting a whole one in her mouth.
It tasted kind of boring and a little salty, not to mention it was hard to chew. She sucked on it a bit to soften it then ate a bit more. This time it tasted a little better. Burbling and drooling happily she ate the rest of the cookie and grabbed another one. She was about to eat it when a funny feeling in her tummy made her look down. There was nothing wrong with her tummy, but something was happening to her legs. They both seemed to be growing bigger, thicker really and their shape was getting funny. Suddenly each leg split in two so she had four legs, one set in front of the other. The shape of each set was funny, they looked like the legs of the puppy on the box and her feet looked like little paws.
She pushed herself up unto her paws and began to use her hands to play with the toes of one of her front paws as the space between both sets of legs grew so that it looked like her body was coming out of the body of a puppy. She realized she was like one of those horsey people except a puppy instead. When her strong little tail grew in it was wagging wildly. Her fur grew sprouted in a lovely brindle pattern, with a white patch on the chest of her puppy body. The fur ended a little below her belly button and from there up she was normal person.
Sitting her puppy body down she grabbed another one of the yummy puppy cookies and gnawed on it with her sharp little teeth. As she did this her hair changed color to match the pattern of her fur and she found herself starting to grow. Her puppy body lost all of its baby roundness as layers of muscle covered it and her person body grew and matured as well. She quickly reached puberty and her breasts returned, full and round. Soon she was the same age she had been before drinking the milk.
Licking the last crumbs of dog biscuit from her lips she ran her tongue over her sharp canine teeth and smiled, "Katie, I'm not a baby anymore!"
The thought was happy enough to make her prance around in a circle, clapping her hands and wagging her tail, "Can we go outside and play now?"
Katie only stared at her, quite understandable since Tiff now resembled a centaur save that her lower body was that of an extremely large pit bull rather than a horse.
When she saw her friend's dismayed expression Tiff bounded across the kitchen to her and licked her on the face. In her excitement about being full grown she forgot all about Katie's problem. Tucking her tail between her legs with shame at having forgotten she whimpered softly, "Sorry Katie I forgot, but can we go out and play after we find something to make your stomach better?"
She licked Katie's face again and rubbed her hands against her friend's over sized belly, wanting Katie to forgive her and maybe pet her some to show that there were no hard feelings.